RUI: Hyperfine Structure Effects in Hydrogen Atom Collisions (Physics)

RUI：氢原子碰撞中的超精细结构效应（物理）

• 批准号: 8807983
• 负责人: Stuart Crampton
• 金额: $ 14.17万
• 依托单位: Williams College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8807983&HistoricalAwards=false
• 关键词: RUI; Hyperfine; Structure; Effects; Hydrogen

An experimental test will be made of theory which includes hyperfine structure effects in low energy electron spin exchange collisions between ground state hydrogen atoms. Measurements of hyperfine-induced frequency-shift cross sections will be made at 0.5 Kelvin using a superfluid liquid helium surface atomic hydrogen maser (at the University of British Columbia) and at 10 Kelvin with a new solid neon surface hydrogen maser (at Williams College). Results will also test the degree to which collisions between hydrogen atoms may limit the stability of cryogenic hydrogen maser frequency standards.

对基态氢原子间低能电子自旋交换碰撞中包含超精细结构效应的理论进行实验验证。超细诱发频移截面的测量将在0.5开尔文的温度下使用超流体液氦表面原子氢脉泽（在不列颠哥伦比亚大学），在10开尔文的温度下使用新的固体氖表面氢脉泽（在威廉姆斯学院）。结果还将测试氢原子之间的碰撞可能限制低温氢脉泽频率标准稳定性的程度。